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| I'd give the last several feet towards a few foot high wall that you can just run the backhoe front bucket against to scoop the mud. Lots of rebar tied into footings and 4,000# concrete. It'll be easier than screwing with the back bucket. Maybe even a 1 or 2 foot deep trench instead, but again as wide as your backhoe to make muck outs easier.
For "real" (or commercial if you will) wash pit separation they have a ramp pit 10' wide, then two weirs with removable baffles in a level area roughly 10 or more feet long, and about 4' deep. After the 3 separations they go to 2 more small separation pits again with baffles, THEN to a pump pit to sewer.
Every so often the user pumps what they can, remove the baffles and with a machine to muck out the first 3 separation areas.
Here is an image of one, the machines in the image are Bobcats for reference.
Edited by Fingers77 3/11/2026 20:56
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Mud trap for washing pad
